Frictional drive for mixers.



C. H.- DASHER.

FRICTIONAL DRIVE FOR MIXERS.

' APPLICATION Fl ED 0 0, 1,203,102. L H 3 9H Patented Oct. 31,1916.

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C. H. DASHER.

FRIGTIONAL DRIVE FOR MIXERS.

APPLICATION FILED DEC.30, I914.

1,203,102. Patented Oct. 31,1916.

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CHARLES H. DASHER, OF OAKLAND, CALIFORNIA.

rRIcrIonAL DRIVE FOB, MIXERS.

7 Application filed December 30, 1914.

To all whom it may concern:

Be it known that 1, CHARLES H. DASHER, a citizen of the United States,residing at Oakland, in the county of Alameda and State of California,have invented certain new and useful Improvements in Frictional Drivesfor Mixers, of which the following is a specification.

The present invention relates to mixers and more particularlyato a typeof mixer adapted for use in the making of concrete.

The invention has for its principal objects to provide an improved formof supporting and driving means for the mixing drum; to provide animproved loading de vice and operating and controlling means therefor.

With the above mentioned and other objects in view, the inventionconsists in the novel construction and combination of parts hereinafterdescribed, illustrated in the accompanying drawings and pointed out inthe claims hereto appended; it being understood that various changes inthe form, proportion, size and minor details of construction within thescope of the appended claims may be resorted towithout departing fromthe spirit or'sacrificing any of the advantages of the invention. I i

To more fully comprehend the invention, reference is directed to theaccompanying drawings, wherein Figure 1 is a view in side elevation ofan embodiment of my invention. Fig. 2 is a view in end elevation withthe mixing drum partly broken away, disclosing the feed hopper andmaterial discharge chute. Fig. 8 is a top plan view of a portion of themixing drum, disclosing the means for rotating the same, the feed hopperand the operating means therefor. Fig. 4 is a view in plan of the hoppersupporting and operating means and the eccentrically mounted windingreel for the feed hopper operating means. Fig. is a sectional view takenon line 55 of Fig. 4:. Fig. 6 is a diagrammatic View of the hopperoperating means and the means for operating the mixing drum.

Referring more particularly to the several views of the drawings,wherein like characters of reference designate corresponding partsthroughout the several views, the numeral 1 represents a supportingframe provided with the supporting wheels 2 forming a carriage therefor.A tubular Specification of Letters Patent.

Patented (lot. 31, 1916.

Serial No. 879,789.

mixing drum or cylinder 3 provided with material feed and dischargeopenings 3 and 3 is carried by the frame 1 and the same rests at oneside on the spaced rotatable supporting wheels 4 carried by a shaft 5supported in bearings 6 on the frame 1. The drum rests at its oppositeside on the drive disk 7 having a substantially V-shaped depression inits periphery and carried by a shaft 8 rotatably supported in bearings9. The drum is formed near its side edges with the annular tracks 10which rest on the wheels 4 and said drum is formed centrally of itsouter surface with an annular outwardly projecting V-shaped trackway 11which is adapted to rest in the V-shaped depression in the periphery ofthe driven disk. It will be observed that the drum is supported at threepoints, and the same is frictionally driven, thus eliminating the rackand gears which often become broken in devices of this class, owing tocharacter of material treated by the machine. It will also be apparentthat the greater the load in the drum, the greater the friction betweenthe drum and drive disk.

The shaft 8 carries a sprocket 10' which is connected preferably by achain 11 with the'sprocket 12 on a drive shaft of a suitable engine orother source of power 13 carried by the frame 1. A side frame ll is supported at its lower end on the frame 1 and extends vertically of theside of the drum 3 adjacent the material feed opening 3 and said frameis connected by the top cross members 15 witha substantially U-shapedframe 16 extending vertically from the frame 1 and positioned adjacentthe material discharge opening 3 Rotatably supported in bearings 17 onthe cross members 15 is a rotatable shaft 18 carrying the winding drums19 011 which wind'thefiexible members 20 connected at their lower endsto eyes 21 on a suitable hopper 22, open at its upper portion and thesidewalls thereof converging to form a chute 23.. The hopper is pivotedat a point beneaththe chute to a bracket 24 carried by the frame 14 andsaid hopper is capable of being elevated to the dotted line positionFig.2, to dump the contents thereof, namely, the material to be mixed, intoi the mixing drum 3. A drum 25 is carried by the shaft 18 and around thesame is wound a flexible member 26 which connects at its lower end witha winding drum 27 mounted on the eccentric portion 28 of a shaft 29secured at its ends in bearings 30, said shaft carrying an operatinglever 31. The winding drum 25 carries an annular flange 32 adapted to bereceived in the V shaped periphery of the drive disk when the lever 31is moved in one direction, and when the lever is moved in the oppositedirection, said annular flange 32 is disconnected from the flange of thedrive disk and is thrown into engagement with the V- shaped recess in aplate 33 which forms a brake.

Trough shaped members 342 and 35 are carried respectively by the shafts36 and 37, rotatably supported by the frame 16, and each of said shaftscarries an offset crank 38, which cranks are connected by a link 39. Theshaft 36 carries a hand lever 40, which, when in its full line position,Fig. 2, causes the inner end of the trough member 34 to project into thedrum through the discharge openings 3 and the outer end thereof to reston the inner end of the trough member 35, and the two trough sectionswhen in this position form a downwardly and outwardly inclined dischargechute.

When the lever 40 is in the dotted line positionFig. 2, the troughsections 34: and 35 overlie"each other and project downwardly and aslight distance inwardly into the discharge opening 3 and prevent thematerial from being discharged through the opening 3 The engine or othersource of power 13 b ing operated to drive the connection 11 in thedirection of the arrow-Fig. 1, will cause the drive disk 7 to berotated, which in turn rotates the mixing drum, and the lever 31 beingoperated to throw the flange 32 into engagement with the drive disk 7will cause the drum 27 to be driven in a direction to unwind theconnection 26 from the drum 25, which operation will cause the shaft 18to rotate and wind the connections 20 on the drums l9, raising the feedhopper from the full line position to the dotted line position the disk32 from the brake plate 33 and permits the weight of the hopper to causethe connection 26 to unwind from the drum 27.

Having thus described my invention what I claim and desire to protect byLetters Patent is 1; In a device of the type set forth, a frame, a pairof axially alined supporting rollers thereon, a rotary member supportedadjacent its ends by the rollers, and a single driving roller journaledon the frame and engaging and supporting the member at a point betweenthe points of support of the first rollers, the point of contact of thedriving roller with the member being circumferentially spaced from thefirst rollers, whereby any extraneous pressure to which the member issubjected is at all times centralized upon the drivingroller regardlessof any shifting of the pressure.

2. In a device of the type set forth, a horizontally disposed rotarymember having peripheral trackway, and a three point supportvconstituting the sole supporting means for the member and comprising a.

pair of axially alined rollers engaging the member'on opposite sides ofthe trackway,

vand a drive roller engaging the track at a point circumferentiallyspaced from the pair of rollers, whereby any extraneous pressure towhich the member is subjected is at all times centralized upon thedriving roller regardless of any shifting of the pressure.

3. In a device of the type set forth, a frame, a pair of axially alined,fiat rimmed, rollers journaled thereon, a driving roller journaled onthe frame in spaced relation to the first rollers and provided in itsperiphery with an annular groove, and a rotary member seated on therollers and provided with a peripheral trackway intermediate the rollersof said pair and received by the peripheral groove of the drivingroller, whereby any extraneous pressure to which the member is subjectedis at all times centralized upon the driving roller regardless of anyshifting of the pressure. 7

In testimony whereof I have signed my name to this specification in thepresence of two. subscribing witnesses.

CHARLES H. DASHER.

Witnesses H. M. OATTIMORE, D. B. RICHARDS.

Copies. 01 this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. G.

